'How to center text in vertical in CSS [duplicate]

what dose "vertical-align:middle;" do? It doesn't center the text in vertical. How to center text in vertical in CSS

#sectionArea {
  vertical-align: middle;
  min-height: 300px;
  text-align: center;
  font-size: 50px;
  font-weight: bolder;
}

<section id="sectionArea">
  <p>Get your resumes quickly and easily.</p>
</section>

html css

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